sys/dev/usb/uhid.c

   1 /*      $NetBSD: uhid.c,v 1.46 2001/11/13 06:24:55 lukem Exp $  */
   2
   3 /* Also already merged from NetBSD:
   4  *      $NetBSD: uhid.c,v 1.54 2002/09/23 05:51:21 simonb Exp $
   5  */
   6
   7 #include <sys/cdefs.h>
   8 __FBSDID("$FreeBSD$");
   9
  10 /*-
  11  * Copyright (c) 1998 The NetBSD Foundation, Inc.
  12  * All rights reserved.
  13  *
  14  * This code is derived from software contributed to The NetBSD Foundation
  15  * by Lennart Augustsson (lennart@augustsson.net) at
  16  * Carlstedt Research & Technology.
  17  *
  18  * Redistribution and use in source and binary forms, with or without
  19  * modification, are permitted provided that the following conditions
  20  * are met:
  21  * 1. Redistributions of source code must retain the above copyright
  22  *    notice, this list of conditions and the following disclaimer.
  23  * 2. Redistributions in binary form must reproduce the above copyright
  24  *    notice, this list of conditions and the following disclaimer in the
  25  *    documentation and/or other materials provided with the distribution.
  26  * 3. All advertising materials mentioning features or use of this software
  27  *    must display the following acknowledgement:
  28  *        This product includes software developed by the NetBSD
  29  *        Foundation, Inc. and its contributors.
  30  * 4. Neither the name of The NetBSD Foundation nor the names of its
  31  *    contributors may be used to endorse or promote products derived
  32  *    from this software without specific prior written permission.
  33  *
  34  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  35  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  36  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  37  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  38  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  39  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  40  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  41  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  42  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  43  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  44  * POSSIBILITY OF SUCH DAMAGE.
  45  */
  46
  47 /*
  48  * HID spec: http://www.usb.org/developers/devclass_docs/HID1_11.pdf
  49  */
  50
  51 /*
  52  * XXX TODO: Convert this driver to use si_drv[12] rather than the
  53  * devclass_get_softc junk
  54  */
  55
  56 #include <sys/param.h>
  57 #include <sys/systm.h>
  58 #include <sys/kernel.h>
  59 #include <sys/lock.h>
  60 #include <sys/malloc.h>
  61 #include <sys/mutex.h>
  62 #include <sys/signalvar.h>
  63 #include <sys/fcntl.h>
  64 #include <sys/ioccom.h>
  65 #include <sys/filio.h>
  66 #include <sys/module.h>
  67 #include <sys/bus.h>
  68 #include <sys/ioccom.h>
  69 #include <sys/conf.h>
  70 #include <sys/tty.h>
  71 #include <sys/selinfo.h>
  72 #include <sys/proc.h>
  73 #include <sys/poll.h>
  74 #include <sys/sysctl.h>
  75 #include <sys/uio.h>
  76
  77 #include <dev/usb/usb.h>
  78 #include <dev/usb/usbhid.h>
  79
  80 #include "usbdevs.h"
  81 #include <dev/usb/usbdi.h>
  82 #include <dev/usb/usbdi_util.h>
  83 #include <dev/usb/hid.h>
  84
  85 /* Replacement report descriptors for devices shipped with broken ones */
  86 #include <dev/usb/ugraphire_rdesc.h>
  87 #include <dev/usb/uxb360gp_rdesc.h>
  88
  89 /* For hid blacklist quirk */
  90 #include <dev/usb/usb_quirks.h>
  91
  92 #ifdef USB_DEBUG
  93 #define DPRINTF(x)      if (uhiddebug) printf x
  94 #define DPRINTFN(n,x)   if (uhiddebug>(n)) printf x
  95 int     uhiddebug = 0;
  96 SYSCTL_NODE(_hw_usb, OID_AUTO, uhid, CTLFLAG_RW, 0, "USB uhid");
  97 SYSCTL_INT(_hw_usb_uhid, OID_AUTO, debug, CTLFLAG_RW,
  98            &uhiddebug, 0, "uhid debug level");
  99 #else
 100 #define DPRINTF(x)
 101 #define DPRINTFN(n,x)
 102 #endif
 103
 104 struct uhid_softc {
 105         device_t sc_dev;                        /* base device */
 106         usbd_device_handle sc_udev;
 107         usbd_interface_handle sc_iface; /* interface */
 108         usbd_pipe_handle sc_intrpipe;   /* interrupt pipe */
 109         int sc_ep_addr;
 110
 111         int sc_isize;
 112         int sc_osize;
 113         int sc_fsize;
 114         u_int8_t sc_iid;
 115         u_int8_t sc_oid;
 116         u_int8_t sc_fid;
 117
 118         u_char *sc_ibuf;
 119         u_char *sc_obuf;
 120
 121         void *sc_repdesc;
 122         int sc_repdesc_size;
 123
 124         struct clist sc_q;
 125         struct selinfo sc_rsel;
 126         struct proc *sc_async;  /* process that wants SIGIO */
 127         u_char sc_state;        /* driver state */
 128 #define UHID_OPEN       0x01    /* device is open */
 129 #define UHID_ASLP       0x02    /* waiting for device data */
 130 #define UHID_NEEDCLEAR  0x04    /* needs clearing endpoint stall */
 131 #define UHID_IMMED      0x08    /* return read data immediately */
 132
 133         int sc_refcnt;
 134         u_char sc_dying;
 135
 136         struct cdev *dev;
 137 };
 138
 139 #define UHIDUNIT(dev)   (minor(dev))
 140 #define UHID_CHUNK      128     /* chunk size for read */
 141 #define UHID_BSIZE      1020    /* buffer size */
 142
 143 d_open_t        uhidopen;
 144 d_close_t       uhidclose;
 145 d_read_t        uhidread;
 146 d_write_t       uhidwrite;
 147 d_ioctl_t       uhidioctl;
 148 d_poll_t        uhidpoll;
 149
 150
 151 static struct cdevsw uhid_cdevsw = {
 152         .d_version =    D_VERSION,
 153         .d_flags =      D_NEEDGIANT,
 154         .d_open =       uhidopen,
 155         .d_close =      uhidclose,
 156         .d_read =       uhidread,
 157         .d_write =      uhidwrite,
 158         .d_ioctl =      uhidioctl,
 159         .d_poll =       uhidpoll,
 160         .d_name =       "uhid",
 161 };
 162
 163 static void uhid_intr(usbd_xfer_handle, usbd_private_handle,
 164                            usbd_status);
 165
 166 static int uhid_do_read(struct uhid_softc *, struct uio *uio, int);
 167 static int uhid_do_write(struct uhid_softc *, struct uio *uio, int);
 168 static int uhid_do_ioctl(struct uhid_softc *, u_long, caddr_t, int,
 169                               struct thread *);
 170
 171 MODULE_DEPEND(uhid, usb, 1, 1, 1);
 172
 173 static device_probe_t uhid_match;
 174 static device_attach_t uhid_attach;
 175 static device_detach_t uhid_detach;
 176
 177 static device_method_t uhid_methods[] = {
 178         /* Device interface */
 179         DEVMETHOD(device_probe,         uhid_match),
 180         DEVMETHOD(device_attach,        uhid_attach),
 181         DEVMETHOD(device_detach,        uhid_detach),
 182
 183         { 0, 0 }
 184 };
 185
 186 static driver_t uhid_driver = {
 187         "uhid",
 188         uhid_methods,
 189         sizeof(struct uhid_softc)
 190 };
 191
 192 static devclass_t uhid_devclass;
 193
 194 DRIVER_MODULE(uhid, uhub, uhid_driver, uhid_devclass, usbd_driver_load, 0);
 195
 196 static int
 197 uhid_match(device_t self)
 198 {
 199         struct usb_attach_arg *uaa = device_get_ivars(self);
 200         usb_interface_descriptor_t *id;
 201
 202         if (uaa->iface == NULL)
 203                 return (UMATCH_NONE);
 204         id = usbd_get_interface_descriptor(uaa->iface);
 205         if (id == NULL)
 206                 return (UMATCH_NONE);
 207         if  (id->bInterfaceClass != UICLASS_HID) {
 208                 /* The Xbox 360 gamepad doesn't use the HID class. */
 209                 if (id->bInterfaceClass != UICLASS_VENDOR ||
 210                     id->bInterfaceSubClass != UISUBCLASS_XBOX360_CONTROLLER ||
 211                     id->bInterfaceProtocol != UIPROTO_XBOX360_GAMEPAD)
 212                         return (UMATCH_NONE);
 213         }
 214         if (usbd_get_quirks(uaa->device)->uq_flags & UQ_HID_IGNORE)
 215                 return (UMATCH_NONE);
 216 #if 0
 217         if (uaa->matchlvl)
 218                 return (uaa->matchlvl);
 219 #endif
 220
 221         return (UMATCH_IFACECLASS_GENERIC);
 222 }
 223
 224 static int
 225 uhid_attach(device_t self)
 226 {
 227         struct uhid_softc *sc = device_get_softc(self);
 228         struct usb_attach_arg *uaa = device_get_ivars(self);
 229         usbd_interface_handle iface = uaa->iface;
 230         usb_interface_descriptor_t *id;
 231         usb_endpoint_descriptor_t *ed;
 232         int size;
 233         void *desc;
 234         const void *descptr;
 235         usbd_status err;
 236
 237         sc->sc_dev = self;
 238         sc->sc_udev = uaa->device;
 239         sc->sc_iface = iface;
 240         id = usbd_get_interface_descriptor(iface);
 241
 242         ed = usbd_interface2endpoint_descriptor(iface, 0);
 243         if (ed == NULL) {
 244                 printf("%s: could not read endpoint descriptor\n",
 245                        device_get_nameunit(sc->sc_dev));
 246                 sc->sc_dying = 1;
 247                 return ENXIO;
 248         }
 249
 250         DPRINTFN(10,("uhid_attach: bLength=%d bDescriptorType=%d "
 251                      "bEndpointAddress=%d-%s bmAttributes=%d wMaxPacketSize=%d"
 252                      " bInterval=%d\n",
 253                      ed->bLength, ed->bDescriptorType,
 254                      ed->bEndpointAddress & UE_ADDR,
 255                      UE_GET_DIR(ed->bEndpointAddress)==UE_DIR_IN? "in" : "out",
 256                      ed->bmAttributes & UE_XFERTYPE,
 257                      UGETW(ed->wMaxPacketSize), ed->bInterval));
 258
 259         if (UE_GET_DIR(ed->bEndpointAddress) != UE_DIR_IN ||
 260             (ed->bmAttributes & UE_XFERTYPE) != UE_INTERRUPT) {
 261                 printf("%s: unexpected endpoint\n", device_get_nameunit(sc->sc_dev));
 262                 sc->sc_dying = 1;
 263                 return ENXIO;
 264         }
 265
 266         sc->sc_ep_addr = ed->bEndpointAddress;
 267
 268         descptr = NULL;
 269         if (uaa->vendor == USB_VENDOR_WACOM) {
 270                 /* The report descriptor for the Wacom Graphire is broken. */
 271                 if (uaa->product == USB_PRODUCT_WACOM_GRAPHIRE) {
 272                         size = sizeof uhid_graphire_report_descr;
 273                         descptr = uhid_graphire_report_descr;
 274                 } else if (uaa->product == USB_PRODUCT_WACOM_GRAPHIRE3_4X5) {
 275                         static uByte reportbuf[] = {2, 2, 2};
 276
 277                         /*
 278                          * The Graphire3 needs 0x0202 to be written to
 279                          * feature report ID 2 before it'll start
 280                          * returning digitizer data.
 281                          */
 282                         usbd_set_report(uaa->iface, UHID_FEATURE_REPORT, 2,
 283                             &reportbuf, sizeof reportbuf);
 284
 285                         size = sizeof uhid_graphire3_4x5_report_descr;
 286                         descptr = uhid_graphire3_4x5_report_descr;
 287                 }
 288         } else if (id->bInterfaceClass == UICLASS_VENDOR &&
 289             id->bInterfaceSubClass == UISUBCLASS_XBOX360_CONTROLLER &&
 290             id->bInterfaceProtocol == UIPROTO_XBOX360_GAMEPAD) {
 291                 static uByte reportbuf[] = {1, 3, 0};
 292
 293                 /* The LEDs on the gamepad are blinking by default, turn off. */
 294                 usbd_set_report(uaa->iface, UHID_OUTPUT_REPORT, 0,
 295                     &reportbuf, sizeof reportbuf);
 296
 297                 /* The Xbox 360 gamepad has no report descriptor. */
 298                 size = sizeof uhid_xb360gp_report_descr;
 299                 descptr = uhid_xb360gp_report_descr;
 300         }
 301
 302         if (descptr) {
 303                 desc = malloc(size, M_USBDEV, M_NOWAIT);
 304                 if (desc == NULL)
 305                         err = USBD_NOMEM;
 306                 else {
 307                         err = USBD_NORMAL_COMPLETION;
 308                         memcpy(desc, descptr, size);
 309                 }
 310         } else {
 311                 desc = NULL;
 312                 err = usbd_read_report_desc(uaa->iface, &desc, &size,M_USBDEV);
 313         }
 314
 315         if (err) {
 316                 printf("%s: no report descriptor\n", device_get_nameunit(sc->sc_dev));
 317                 sc->sc_dying = 1;
 318                 return ENXIO;
 319         }
 320
 321         (void)usbd_set_idle(iface, 0, 0);
 322
 323         sc->sc_isize = hid_report_size(desc, size, hid_input,   &sc->sc_iid);
 324         sc->sc_osize = hid_report_size(desc, size, hid_output,  &sc->sc_oid);
 325         sc->sc_fsize = hid_report_size(desc, size, hid_feature, &sc->sc_fid);
 326
 327         sc->sc_repdesc = desc;
 328         sc->sc_repdesc_size = size;
 329         sc->dev = make_dev(&uhid_cdevsw, device_get_unit(self),
 330                         UID_ROOT, GID_OPERATOR,
 331                         0644, "uhid%d", device_get_unit(self));
 332         return 0;
 333 }
 334
 335 static int
 336 uhid_detach(device_t self)
 337 {
 338         struct uhid_softc *sc = device_get_softc(self);
 339         int s;
 340
 341         DPRINTF(("uhid_detach: sc=%p\n", sc));
 342         sc->sc_dying = 1;
 343         if (sc->sc_intrpipe != NULL)
 344                 usbd_abort_pipe(sc->sc_intrpipe);
 345
 346         if (sc->sc_state & UHID_OPEN) {
 347                 s = splusb();
 348                 if (--sc->sc_refcnt >= 0) {
 349                         /* Wake everyone */
 350                         wakeup(&sc->sc_q);
 351                         /* Wait for processes to go away. */
 352                         usb_detach_wait(sc->sc_dev);
 353                 }
 354                 splx(s);
 355         }
 356         destroy_dev(sc->dev);
 357
 358         if (sc->sc_repdesc)
 359                 free(sc->sc_repdesc, M_USBDEV);
 360
 361         return (0);
 362 }
 363
 364 void
 365 uhid_intr(usbd_xfer_handle xfer, usbd_private_handle addr, usbd_status status)
 366 {
 367         struct uhid_softc *sc = addr;
 368
 369 #ifdef USB_DEBUG
 370         if (uhiddebug > 5) {
 371                 u_int32_t cc, i;
 372
 373                 usbd_get_xfer_status(xfer, NULL, NULL, &cc, NULL);
 374                 DPRINTF(("uhid_intr: status=%d cc=%d\n", status, cc));
 375                 DPRINTF(("uhid_intr: data ="));
 376                 for (i = 0; i < cc; i++)
 377                         DPRINTF((" %02x", sc->sc_ibuf[i]));
 378                 DPRINTF(("\n"));
 379         }
 380 #endif
 381
 382         if (status == USBD_CANCELLED)
 383                 return;
 384
 385         if (status != USBD_NORMAL_COMPLETION) {
 386                 DPRINTF(("uhid_intr: status=%d\n", status));
 387                 if (status == USBD_STALLED)
 388                     sc->sc_state |= UHID_NEEDCLEAR;
 389                 return;
 390         }
 391
 392         (void) b_to_q(sc->sc_ibuf, sc->sc_isize, &sc->sc_q);
 393
 394         if (sc->sc_state & UHID_ASLP) {
 395                 sc->sc_state &= ~UHID_ASLP;
 396                 DPRINTFN(5, ("uhid_intr: waking %p\n", &sc->sc_q));
 397                 wakeup(&sc->sc_q);
 398         }
 399         selwakeuppri(&sc->sc_rsel, PZERO);
 400         if (sc->sc_async != NULL) {
 401                 DPRINTFN(3, ("uhid_intr: sending SIGIO %p\n", sc->sc_async));
 402                 PROC_LOCK(sc->sc_async);
 403                 psignal(sc->sc_async, SIGIO);
 404                 PROC_UNLOCK(sc->sc_async);
 405         }
 406 }
 407
 408 int
 409 uhidopen(struct cdev *dev, int flag, int mode, struct thread *p)
 410 {
 411         struct uhid_softc *sc;
 412         usbd_status err;
 413
 414         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 415         if (sc == NULL)
 416                 return (ENXIO);
 417
 418         DPRINTF(("uhidopen: sc=%p\n", sc));
 419
 420         if (sc->sc_dying)
 421                 return (ENXIO);
 422
 423         if (sc->sc_state & UHID_OPEN)
 424                 return (EBUSY);
 425         sc->sc_state |= UHID_OPEN;
 426
 427         clist_alloc_cblocks(&sc->sc_q, UHID_BSIZE, UHID_BSIZE);
 428         sc->sc_ibuf = malloc(sc->sc_isize, M_USBDEV, M_WAITOK);
 429         sc->sc_obuf = malloc(sc->sc_osize, M_USBDEV, M_WAITOK);
 430
 431         /* Set up interrupt pipe. */
 432         err = usbd_open_pipe_intr(sc->sc_iface, sc->sc_ep_addr,
 433                   USBD_SHORT_XFER_OK, &sc->sc_intrpipe, sc, sc->sc_ibuf,
 434                   sc->sc_isize, uhid_intr, USBD_DEFAULT_INTERVAL);
 435         if (err) {
 436                 DPRINTF(("uhidopen: usbd_open_pipe_intr failed, "
 437                          "error=%d\n",err));
 438                 free(sc->sc_ibuf, M_USBDEV);
 439                 free(sc->sc_obuf, M_USBDEV);
 440                 sc->sc_ibuf = sc->sc_obuf = NULL;
 441
 442                 sc->sc_state &= ~UHID_OPEN;
 443                 return (EIO);
 444         }
 445
 446         sc->sc_state &= ~UHID_IMMED;
 447
 448         sc->sc_async = 0;
 449
 450         return (0);
 451 }
 452
 453 int
 454 uhidclose(struct cdev *dev, int flag, int mode, struct thread *p)
 455 {
 456         struct uhid_softc *sc;
 457
 458         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 459
 460         DPRINTF(("uhidclose: sc=%p\n", sc));
 461
 462         /* Disable interrupts. */
 463         usbd_abort_pipe(sc->sc_intrpipe);
 464         usbd_close_pipe(sc->sc_intrpipe);
 465         sc->sc_intrpipe = 0;
 466
 467         ndflush(&sc->sc_q, sc->sc_q.c_cc);
 468         clist_free_cblocks(&sc->sc_q);
 469
 470         free(sc->sc_ibuf, M_USBDEV);
 471         free(sc->sc_obuf, M_USBDEV);
 472         sc->sc_ibuf = sc->sc_obuf = NULL;
 473
 474         sc->sc_state &= ~UHID_OPEN;
 475
 476         sc->sc_async = 0;
 477
 478         return (0);
 479 }
 480
 481 int
 482 uhid_do_read(struct uhid_softc *sc, struct uio *uio, int flag)
 483 {
 484         int s;
 485         int error = 0;
 486         size_t length;
 487         u_char buffer[UHID_CHUNK];
 488         usbd_status err;
 489
 490         DPRINTFN(1, ("uhidread\n"));
 491         if (sc->sc_state & UHID_IMMED) {
 492                 DPRINTFN(1, ("uhidread immed\n"));
 493
 494                 err = usbd_get_report(sc->sc_iface, UHID_INPUT_REPORT,
 495                           sc->sc_iid, buffer, sc->sc_isize);
 496                 if (err)
 497                         return (EIO);
 498                 return (uiomove(buffer, sc->sc_isize, uio));
 499         }
 500
 501         s = splusb();
 502         while (sc->sc_q.c_cc == 0) {
 503                 if (flag & O_NONBLOCK) {
 504                         splx(s);
 505                         return (EWOULDBLOCK);
 506                 }
 507                 sc->sc_state |= UHID_ASLP;
 508                 DPRINTFN(5, ("uhidread: sleep on %p\n", &sc->sc_q));
 509                 error = tsleep(&sc->sc_q, PZERO | PCATCH, "uhidrea", 0);
 510                 DPRINTFN(5, ("uhidread: woke, error=%d\n", error));
 511                 if (sc->sc_dying)
 512                         error = EIO;
 513                 if (error) {
 514                         sc->sc_state &= ~UHID_ASLP;
 515                         break;
 516                 }
 517                 if (sc->sc_state & UHID_NEEDCLEAR) {
 518                         DPRINTFN(-1,("uhidread: clearing stall\n"));
 519                         sc->sc_state &= ~UHID_NEEDCLEAR;
 520                         usbd_clear_endpoint_stall(sc->sc_intrpipe);
 521                 }
 522         }
 523         splx(s);
 524
 525         /* Transfer as many chunks as possible. */
 526         while (sc->sc_q.c_cc > 0 && uio->uio_resid > 0 && !error) {
 527                 length = min(sc->sc_q.c_cc, uio->uio_resid);
 528                 if (length > sizeof(buffer))
 529                         length = sizeof(buffer);
 530
 531                 /* Remove a small chunk from the input queue. */
 532                 (void) q_to_b(&sc->sc_q, buffer, length);
 533                 DPRINTFN(5, ("uhidread: got %lu chars\n", (u_long)length));
 534
 535                 /* Copy the data to the user process. */
 536                 if ((error = uiomove(buffer, length, uio)) != 0)
 537                         break;
 538         }
 539
 540         return (error);
 541 }
 542
 543 int
 544 uhidread(struct cdev *dev, struct uio *uio, int flag)
 545 {
 546         struct uhid_softc *sc;
 547         int error;
 548
 549         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 550         sc->sc_refcnt++;
 551         error = uhid_do_read(sc, uio, flag);
 552         if (--sc->sc_refcnt < 0)
 553                 usb_detach_wakeup(sc->sc_dev);
 554         return (error);
 555 }
 556
 557 int
 558 uhid_do_write(struct uhid_softc *sc, struct uio *uio, int flag)
 559 {
 560         int error;
 561         int size;
 562         usbd_status err;
 563
 564         DPRINTFN(1, ("uhidwrite\n"));
 565
 566         if (sc->sc_dying)
 567                 return (EIO);
 568
 569         size = sc->sc_osize;
 570         error = 0;
 571         if (uio->uio_resid != size)
 572                 return (EINVAL);
 573         error = uiomove(sc->sc_obuf, size, uio);
 574         if (!error) {
 575                 if (sc->sc_oid)
 576                         err = usbd_set_report(sc->sc_iface, UHID_OUTPUT_REPORT,
 577                                   sc->sc_obuf[0], sc->sc_obuf+1, size-1);
 578                 else
 579                         err = usbd_set_report(sc->sc_iface, UHID_OUTPUT_REPORT,
 580                                   0, sc->sc_obuf, size);
 581                 if (err)
 582                         error = EIO;
 583         }
 584
 585         return (error);
 586 }
 587
 588 int
 589 uhidwrite(struct cdev *dev, struct uio *uio, int flag)
 590 {
 591         struct uhid_softc *sc;
 592         int error;
 593
 594         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 595         sc->sc_refcnt++;
 596         error = uhid_do_write(sc, uio, flag);
 597         if (--sc->sc_refcnt < 0)
 598                 usb_detach_wakeup(sc->sc_dev);
 599         return (error);
 600 }
 601
 602 int
 603 uhid_do_ioctl(struct uhid_softc *sc, u_long cmd, caddr_t addr, int flag,
 604               struct thread *p)
 605 {
 606         struct usb_ctl_report_desc *rd;
 607         struct usb_ctl_report *re;
 608         int size, id;
 609         usbd_status err;
 610
 611         DPRINTFN(2, ("uhidioctl: cmd=%lx\n", cmd));
 612
 613         if (sc->sc_dying)
 614                 return (EIO);
 615
 616         switch (cmd) {
 617         case FIONBIO:
 618                 /* All handled in the upper FS layer. */
 619                 break;
 620
 621         case FIOASYNC:
 622                 if (*(int *)addr) {
 623                         if (sc->sc_async != NULL)
 624                                 return (EBUSY);
 625                         sc->sc_async = p->td_proc;
 626                         DPRINTF(("uhid_do_ioctl: FIOASYNC %p\n", sc->sc_async));
 627                 } else
 628                         sc->sc_async = NULL;
 629                 break;
 630
 631         /* XXX this is not the most general solution. */
 632         case TIOCSPGRP:
 633                 if (sc->sc_async == NULL)
 634                         return (EINVAL);
 635                 if (*(int *)addr != sc->sc_async->p_pgid)
 636                         return (EPERM);
 637                 break;
 638
 639         case USB_GET_REPORT_DESC:
 640                 rd = (struct usb_ctl_report_desc *)addr;
 641                 size = min(sc->sc_repdesc_size, sizeof rd->ucrd_data);
 642                 rd->ucrd_size = size;
 643                 memcpy(rd->ucrd_data, sc->sc_repdesc, size);
 644                 break;
 645
 646         case USB_SET_IMMED:
 647                 if (*(int *)addr) {
 648                         /* XXX should read into ibuf, but does it matter? */
 649                         err = usbd_get_report(sc->sc_iface, UHID_INPUT_REPORT,
 650                                   sc->sc_iid, sc->sc_ibuf, sc->sc_isize);
 651                         if (err)
 652                                 return (EOPNOTSUPP);
 653
 654                         sc->sc_state |=  UHID_IMMED;
 655                 } else
 656                         sc->sc_state &= ~UHID_IMMED;
 657                 break;
 658
 659         case USB_GET_REPORT:
 660                 re = (struct usb_ctl_report *)addr;
 661                 switch (re->ucr_report) {
 662                 case UHID_INPUT_REPORT:
 663                         size = sc->sc_isize;
 664                         id = sc->sc_iid;
 665                         break;
 666                 case UHID_OUTPUT_REPORT:
 667                         size = sc->sc_osize;
 668                         id = sc->sc_oid;
 669                         break;
 670                 case UHID_FEATURE_REPORT:
 671                         size = sc->sc_fsize;
 672                         id = sc->sc_fid;
 673                         break;
 674                 default:
 675                         return (EINVAL);
 676                 }
 677                 err = usbd_get_report(sc->sc_iface, re->ucr_report, id, re->ucr_data,
 678                           size);
 679                 if (err)
 680                         return (EIO);
 681                 break;
 682
 683         case USB_SET_REPORT:
 684                 re = (struct usb_ctl_report *)addr;
 685                 switch (re->ucr_report) {
 686                 case UHID_INPUT_REPORT:
 687                         size = sc->sc_isize;
 688                         id = sc->sc_iid;
 689                         break;
 690                 case UHID_OUTPUT_REPORT:
 691                         size = sc->sc_osize;
 692                         id = sc->sc_oid;
 693                         break;
 694                 case UHID_FEATURE_REPORT:
 695                         size = sc->sc_fsize;
 696                         id = sc->sc_fid;
 697                         break;
 698                 default:
 699                         return (EINVAL);
 700                 }
 701                 err = usbd_set_report(sc->sc_iface, re->ucr_report, id, re->ucr_data,
 702                           size);
 703                 if (err)
 704                         return (EIO);
 705                 break;
 706
 707         case USB_GET_REPORT_ID:
 708                 *(int *)addr = 0;       /* XXX: we only support reportid 0? */
 709                 break;
 710
 711         default:
 712                 return (EINVAL);
 713         }
 714         return (0);
 715 }
 716
 717 int
 718 uhidioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *p)
 719 {
 720         struct uhid_softc *sc;
 721         int error;
 722
 723         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 724         sc->sc_refcnt++;
 725         error = uhid_do_ioctl(sc, cmd, addr, flag, p);
 726         if (--sc->sc_refcnt < 0)
 727                 usb_detach_wakeup(sc->sc_dev);
 728         return (error);
 729 }
 730
 731 int
 732 uhidpoll(struct cdev *dev, int events, struct thread *p)
 733 {
 734         struct uhid_softc *sc;
 735         int revents = 0;
 736         int s;
 737
 738         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 739         if (sc->sc_dying)
 740                 return (EIO);
 741
 742         s = splusb();
 743         if (events & (POLLOUT | POLLWRNORM))
 744                 revents |= events & (POLLOUT | POLLWRNORM);
 745         if (events & (POLLIN | POLLRDNORM)) {
 746                 if (sc->sc_q.c_cc > 0)
 747                         revents |= events & (POLLIN | POLLRDNORM);
 748                 else
 749                         selrecord(p, &sc->sc_rsel);
 750         }
 751
 752         splx(s);
 753         return (revents);
 754 }